Here you can find a Xilinx CPLD based GameBoy cart project. The device has 16 programmable digital IO ports and it is fully programmable/configurable. It also have support to connet an external 6-12V DC power into this board.
This site describes a PC utility which allows you to make a text file into a readable book on Gameboy or Gameboy Advance. The book supports most world languages.
Gameboy cartridge that provide prowerfull access of
- Gameboy ressources (display, keyboard...) without knowledge to PIC developpers
- Digital & Analog I/O without knowledge of PIC to Gameboy developpers
